Retention Limits
The metadata required to identify the rows that have changed between checkpoints is stored in journals. These journals are cleaned up as checkpoints are copied to mirror grids.
A limit on the size of the journals can be specified when creating the grid by using the checkpoint_journal_max_bytes setting. When the journal exceeds this size, ActiveSpaces begins deleting journal rows, starting with the oldest available. The journals may be disabled entirely by setting the checkpoint_journals option to disabled. If journals are disabled or if the maximum size is set too low, ActiveSpaces is forced to rely on bulk mirroring, which results in more network traffic between grids. For more details on bulk mirroring, see "Bulk Mirroring" in the TIBCO ActiveSpaces® Concepts guide.
Limiting the Size of Checkpoints
You can also delete both manual and periodic checkpoints by setting the checkpoint_retention_limit property. By default, it is 0, which means that the older checkpoints are not removed. This setting ensures that the number of checkpoints do not keep growing and consuming disk space.